How do I test a file upload in rails?

Question

I have a controller which is responsible for accepting JSON files and then processing the JSON files to do some user maintenance for our application. In user testing the fil

Answer 1

if you are getting the file in your controller with the following

json_file = params[:json_file]
FileUtils.mv(json_file.tempfile, File.expand_path('.')+'/tmp/newfile.json')

then try the following in your specs:

json_file = mock('JsonFile')
json_file.should_receive(:tempfile).and_return("files/bulk_bookmark.json")
post 'import', :json_file => json_file
response.should be_success

This will make the fake method to 'tempfile' method, which will return the path to the loaded file.